| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 54°F | 42°F | 4.5" |
| February | 35°F | 57°F | 45°F | 3.7" |
| March | 44°F | 67°F | 55°F | 5.4" |
| April | 52°F | 77°F | 64°F | 5.9" |
| May | 61°F | 83°F | 72°F | 5.8" |
| June | 71°F | 92°F | 81°F | 3.6" |
| July | 73°F | 93°F | 83°F | 4.6" |
| August | 73°F | 93°F | 83°F | 3.9" |
| September | 66°F | 88°F | 76°F | 3.4" |
| October | 53°F | 78°F | 64°F | 3.7" |
| November | 42°F | 66°F | 53°F | 4.2" |
| December | 35°F | 56°F | 45°F | 5.6" |
| Index | White Haven-Coro Lake | Memphis | Tennessee |
| Air quality index | 44 | 44 | 76 |
| Pollution index | 1,042,680 | 2,860,420 | 3,610,474 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 239 |
| Days with moderate air quality | 124 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.040% |
| Mercury | 0.640% |
| City, State | Population | Air Quality Index | National Avg. |
| Marion, AR | 12,323 | 44 | 12% |
| Hernando, MS | 15,227 | 44 | 12% |
| Southaven, MS | 51,816 | 44 | 12% |
| Crawfordsville, AR | 548 | 44 | 12% |
| Sunset, AR | 168 | 44 | 12% |
| Memphis, TN | 655,857 | 44 | 12% |
| City, State | Population | Air Quality Index | National Avg. |
| Boston, MA | 658,279 | 47 | 6% |
| Washington, DC | 659,009 | 49 | 2% |
| Denver, CO | 663,303 | 54 | 8% |
| Nashville, TN | 643,771 | 45 | 10% |
| Seattle, WA | 668,849 | 49 | 2% |
| Memphis, TN | 655,857 | 44 | 12% |